Bellows pump
AssigneeStainless Steel Products, Inc.
InventorArthur L. Moore
Life of this patent
Estimating the term…
Abstract
A metallic bellows pumps for pumping corrosive, caustic, acidic or toxic fluids which includes a casing with an annular bellows portion within said casing with one end affixed to the casing and the other secured to a piston closure plate with the plate and bellows being moveable toward and away from the fixed end to receive and discharge a fluid with reciprocating movement of the bellows within the casing, and power means to activate and control the movement of the bellows within the bellows pump.
Claims14
A reciprocating metallic bellows pump adapted to receive a fluid in a measured quantity and discharge the same from the pump in a preselected period of time, said pump comprising:
- a metallic casing including first and second end closures to seal the inside of said casing;
- a hollow flexible formed metallic bellows having ends and also having walls of a common thickness, with one end affixed to said first end closure and said second end secured to a piston closure plate, said end and said piston closure plate being free to shift toward and from said fixed end by the contraction and expansion of said bellows due to external pressure means said bellows is a single piece of metal and includes more than four annular convolutions and each convolution separated from another by an annular web of a lesser diameter than said annular convolutions;
- an inlet means to said casing capable of delivering said fluid to said bellows pump with contracted movement of said bellows;
- an outlet means in said casing capable of discharging said delivered fluid when said bellows is expanded;
- said metallic casing includes an annular wall and said bellows is annular and spaced from said annular wall wherein a space is created around said bellows and between said second end closure and said piston closure plate when said bellows is contracted;
- and
- said spaces are adapted to receive said fluid for discharging.
A system for pumping a fluids at high temperature at elevated pressures from an external source in preselected amounts and predetermined time comprising:
- a pair of reciprocating metallic bellows pumps in end to end relationship, each adapted to receive said fluid and discharge the same, said pumps each including:
- a metallic casing including a first and second end closure wherein in said end to end relationship the first end of one of said first bellows pumps is opposite said second end closure of said second bellows pump;
- each pump includes a flexible hollow formed metallic resilient bellows having ends and also having walls of a common thickness, with one end affixed to said first end closure and said second end secured to a piston closure plate, said second end and said piston closure plate being free to shift toward and from said fixed end by the contraction and expansion of said bellows due to external pressure means said bellows is a single piece of metal and includes more than four annular convolutions and each convolution separated from another by an annular web of a lesser diameter than said annular convolutions;
- an external fluid source communicating with the interior of said casing of at least one of said pumps to deliver fluid thereto with controlled movement of said bellows;
- an outlet means in said casing of at least one of said pumps to discharge said delivered fluid when said bellows is expanded;
- said external pressure means including an air source;
- pressure limit switches to control air to said pump;
- and
- an air pressure actuated valve means to channel the air pressure to said bellows and said pressure limit switches whereby when one of said bellows is contracted to force out said fluid said other bellow is extended
- each of each of said metallic casings includes an annular wall and said bellows are annular and spaced from said annular wall wherein a space is created around said bellows and between said second end closure and said piston closure plate when said bellows are contracted;
- and
- said spaces are adapted to receive said fluid for discharging.
Dependencies are inferred from the claim text.